Master key for card punching controls



April 26, 1938.

J. T. JQWETT MASTER KEY FOR CARD PUNCHING CONTROLS Filed July 9, 1937INVENTOR- James ZiJawztZ By W TTORNEYS.

Patented Apr. 26, 1938 PATENT OFFHCIE MASTER KEY FOR CARD PUNCHINGCONTROLS James T. Jowett, Philadelphia, Pa.

Application July 9, 1937, Serial No. 152,705

9 Claims.

This invention relates to card punching controls, and more particularlyto those used in connection with Jacquard looms for weave and patternproduction. I

More specifically, the present invention primarily aims to provide Whatwill be hereinafter termed as a substitute master key, the same being ofa type to coact with or over-reach a predetermined number of adjacentkeys for the purfa pose of effecting group punching and successiverepeats thereof; or for selectively actuating spacially related keys toeither side of said master key.

Subsidiary objects and attendant advantages of the invention will behereinafter specifically referred to, or become apparent from thefollowing disclosure, considered in connection with the drawing, inwhich,

Fig. I is a plan view of a piano-machine head illustrating applicationthereto of two convenient embodiments of the master key of thisinvention.

Fig. II is a section on the plane designated IIII in the precedingillustration.

Fig. III is a broken perspective View of one form of the key adapted forgroup control of four adjacent punching plungers.

Fig. IV is a broken fragmentary View, with parts in section, of amodified form of the invention, showing how a selected key or keyswithin the limits of the master key head may be left undisturbed duringuse of said master key.

Fig. V is a detail showing how selected keys can be left in action orput-out of action by removal of a plug from the master key head;

and,

Fig. VI is a cross-section thereof.

Referring more in detail to the drawing, a conventional piano-machinehead is generally designated by the reference t, the same havingapertures 5 whereby it is attachable to the plunger of an appropriatepunching mechanism; while B-l9 inclusive indicate the usual keys fornormal control of the punching plungers 20-35, ex-

cept as hereinafter disclosed.

In accordance with the present improvements, master keys 36, 31 are forinstance and respectively substituted for the customary keys that wouldotherwise control the punching plungers 25 and 30 for example, saidmaster keys, being adapted to couple together one-and-two other keysIll, ii, and 2 to each side thereof, or oneand-one other keys Hi, It,respectively, and by way of example only. Each master key 36 or 31embodies a stem 38 with a head 39, said head being, preferably, ofarcual longitudinal formation and disposed relative to said stem forpoint contact overone or more adjacent keys 6-H], and it is alsocross-sectionally suitably-shaped for key-top engagement, as bestappreciated from Figs. II, V, and VI. In other words, the master keyhead 39 is cross-sectionally troughed or spacedly concaved at Ml,FigscII and III, to prevent lateral or pivotal displacement when usedfor the group control of predeam termined punching-plungers Ell-35.

In the specific embodiments shown of the master keys 36, 31, the formercontrols the four punching-plungers 24-21, and the latter thepunching-plungers ZQ-Bl, so that When the 15 respective master keys areindividually depressed, the associated punohing-plungers will besimultaneously actuated without any inconvenience to the operator.

In the forms of the invention shown in Figs. IV-VI, inclusive, partscorresponding with or similar to those previously described aredesignated by like characters with a prime exponent, in order to obviaterepetitive description. It is, however, to be noted that the master key0 stem 38 has its upper end 4i reduced in diameter for forced fit, orotherwise, engagement in a suitable hole 42 provided for its receptionin the key head 39; and that said head may be formed with one, or more,apertures 43 therethrough for free passage of the key ll when the masterkey 36 is depressed. Thus it will be readily seen that, as the key llpasses through the aperture 43, the associated punch 26 will not beoperated, but missed; and the desired grip on the jacquard cardobtained. In some instances, as best understood from Figs. V and VI, theaperture or apertures through the master key head 39, may bescrew-threaded as shown at 44, and slightly counterbored at 45, forreception of con- 40 formative removable screw-plugs 46, it beingunderstood the threaded borings 44 will be of a diameter for freepassage of the associated key head. Still further, it is to be remarkedthat the screwplugs 46 are concaved at the inner end 45 41 for pointcontact with the key-heads; and

that by provision of the counterboring 45 the removable plugs 46 will befrictionally locked in place when used.

From the foregoing it will be obvious that the 50 master keys 3%, 31 or36' may be made for joint actuation of any adjoining one or moreadjacent keys 6-! 9 collectively or for repeats, or that any one or moreproximate keys 6-! 9 may be missed. Still further, it is clearlyapparent that master 55 keys 36, 3'! or 36, of the type disclosed may beemployed for any selected group operation of keys 6-49; as well assubstituted for any conventional key 6-l9 within the range of thepiano-machine head, whereby the selective cutting of jacquard cards isrendered much more simple with attendant economy in time and labor, orsubsequent correction.

Having thus described my invention, I claim:

1. A master key for card-punching machines adapted to operate adjacentkeys simultaneously, said key embodying a stem for substitution in placeof a Withdrawn conventional key, and a head on said stem engageable overflanking key heads to effect group punching and successive repeatsthereof.

2. A master key for card-punching machines adapted to operate adjacentand relatively-spaced keys simultaneously, said key embodying a stem forinsertion into the socket of a withdrawn conventional key, and a head onsaid stem with one or more apertures therethrough for respectivelyoperating the adjacent and relatively-spaced keys respectively.

3. A master key for card-punching machines adapted to operate adjacentand relatively-spaced keys simultaneously, said key embodying a stem forinsertion into the socket of a withdrawn con-- ventional key, a head onsaid stem with one or more apertures therethrough for respectivelyoperating the adjacent and relatively-spaced keys respectively, and saidaperture or apertures missing intervening keys.

4. A master key for radially-disposed card punching keys adapted tooperate multiples thereof simultaneously, said key embodying a stem forinsertion in the socket of a Withdrawn conventional key, and a head forconcurrent tangential point contact with flanking key heads.

5. A master key for card-punching machines of the type disclosed andadapted to operate adjacent keys simultaneously, said key embodying astem for substitution in place of a withdrawn conventional key, and alongitudinally arcual head extending to both sides of said stem forcoaction with one or more flanking key heads.

6. A master key for jacquard card-punching machines, as defined in claim5, wherein the arcual head is of a trough-like cross-section to preventlateral movement with respect to the flanking keys actuated thereby.

7. A master key for jacquard card-punching machines, as defined in claim5, wherein the arcual head differentially extends to each side of thestem for coaction with a single and multiple adjacently flanking keysrespectively.

8. A master key for card-punching machines, as defined in claim 3,wherein the aperture through the key head is screw-threaded, and aremovable plug is fitted into said aperture.

9. A master key for card-punching machines, as defined in claim 3,wherein the aperture through the key head is counter-bored andscrewthreaded for reception of a complemental screwplug, and said plughas its inner end concaved for point contact with the conventionalpunching machine key-head.

JAMIES T. JOWETT.

